Solenoid (disambiguation)
Encyclopedia
A solenoid may refer to
- Solenoidal vector field in mathematics, a vector fieldVector fieldIn vector calculus, a vector field is an assignmentof a vector to each point in a subset of Euclidean space. A vector field in the plane for instance can be visualized as an arrow, with a given magnitude and direction, attached to each point in the plane...
characterized as having zero divergenceDivergenceIn vector calculus, divergence is a vector operator that measures the magnitude of a vector field's source or sink at a given point, in terms of a signed scalar. More technically, the divergence represents the volume density of the outward flux of a vector field from an infinitesimal volume around...
. - SolenoidSolenoidA solenoid is a coil wound into a tightly packed helix. In physics, the term solenoid refers to a long, thin loop of wire, often wrapped around a metallic core, which produces a magnetic field when an electric current is passed through it. Solenoids are important because they can create...
in physics or engineering- a starter solenoidStarter solenoidA starter solenoid is the part of an automobile which relays a large electric current to the starter motor, which in turn sets the engine in motion...
, part of an automobile ignition system; also called a starter relay - automotive transmission solenoidTransmission solenoidA transmission solenoid is an electro-hydraulic valve that controls fluid flow into and throughout an automatic transmission. Solenoids can be normally open or normally closed. They operate via a voltage or current supplied via the transmission computer or controller...
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- a starter solenoid
- Solenoid (DNA)Solenoid (DNA)The solenoid defines the packing of DNA as a 30nm fiber of chromatin and results from the helical winding of at least five nucleosome strands....
in GeneticsGeneticsGenetics , a discipline of biology, is the science of genes, heredity, and variation in living organisms.... - Solenoid (mathematics)Solenoid (mathematics)In mathematics, a solenoid is a compact connected topological space that may be obtained as the inverse limit of an inverse system of topological groups and continuous homomorphisms...
- Solenoid valveSolenoid valveA solenoid valve is an electromechanical valve for use with liquid or gas. The valve is controlled by an electric current through a solenoid: in the case of a two-port valve the flow is switched on or off; in the case of a three-port valve, the outflow is switched between the two outlet ports...